A061874 - OEIS

A061874

|First digit - second digit + third digit - fourth digit ...| = 5.

5, 16, 27, 38, 49, 50, 61, 72, 83, 94, 104, 115, 126, 137, 148, 159, 160, 171, 182, 193, 203, 214, 225, 236, 247, 258, 269, 270, 281, 292, 302, 313, 324, 335, 346, 357, 368, 379, 380, 391, 401, 412, 423, 434, 445, 456, 467, 478, 489, 490, 500, 511, 522, 533

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..54.

MATHEMATICA

Do[ a = IntegerDigits[ n ]; l = Length[ a ]; e = o = {}; Do[ o = Append[ o, a[ [ 2k - 1 ] ] ], {k, 1, l/2 + .5} ]; Do[ e = Append[ e, a[ [ 2k ] ] ], {k, 1, l/2} ]; If[ Abs[ Apply[ Plus, o ] - Apply[ Plus, e ] ] == 5, Print[ n ] ], {n, 1, 1000} ]

Select[Range[600], Abs[Total[Times@@@Partition[Riffle[IntegerDigits[#], {1, -1}, {2, -1, 2}], 2]]]==5&] (* Harvey P. Dale, Dec 15 2012 *)

CROSSREFS

Cf. A008593, A060978-A060980, A060982, A061470-A061479, A061870-A061882.

Sequence in context: A227586 A335416 A018197 * A341006 A017449 A056736

Adjacent sequences: A061871 A061872 A061873 * A061875 A061876 A061877

KEYWORD

nonn,base,easy

AUTHOR

Robert G. Wilson v, May 10 2001

STATUS

approved