A092861 - OEIS

A092861

"Product" of the sequence of primes and the "evil" numbers (A001969).

4, 7, 9, 12, 14, 15, 18, 19, 21, 25, 26, 33, 35, 36, 37, 40, 41, 42, 44, 47, 48, 50, 54, 55, 58, 59, 60, 64, 65, 66, 69, 72, 77, 78, 79, 80, 84, 86, 87, 88, 89, 90, 91, 97, 99, 100, 105, 106, 107, 108, 110, 111, 112, 114, 115, 116, 117, 118, 120, 122, 123, 125, 127, 128

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OFFSET

1,1

COMMENTS

If two monotonic sequences are mapped into the real section of (0,1), as it is defined in A051006 and the product of the two reals mapped back into the set of monotonic sequences as defined in A092855, then we have the "product" of the two sequences.

LINKS

Table of n, a(n) for n=1..64.

Ferenc Adorjan, Binary mapping of monotonic sequences and the Aronson function

PROG

(PARI) {prod(a, b)= /*Returns the "product" of monotonic sequences a and b */ return(mtinv(mt(a)*mt(b))) /* the functions mt(a) and mtinv(r) are defined in A051006 and A092855, respectively */ }

CROSSREFS

Cf. A092855, A051006, A092857, A092858, A092859, A092860, A092862, A092863, A092874.

Sequence in context: A362185 A085922 A048973 * A248561 A360925 A007072

Adjacent sequences: A092858 A092859 A092860 * A092862 A092863 A092864

KEYWORD

easy,nonn

AUTHOR

Ferenc Adorjan (fadorjan(AT)freemail.hu)

STATUS

approved