A030599 - OEIS

A030599

Length of n-th run of digit 4 in A030588.

1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1

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

OFFSET

1,25

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..20000

PROG

(PARI)

up_to = 20000;

A030599list(up_to, d=4) = { my(v=vector(up_to), ds=List([]), o=1, j=1, rl=0, i=0); while(i<up_to, if(j>#ds, ds=digits(o, 6); j=1; o+=2); if(d==ds[j], rl++, if(rl, i++; v[i] = rl; rl=0)); j++); (v); };

v030599 = A030599list(up_to);

A030599(n) = v030599[n]; \\ Antti Karttunen, Dec 24 2018

CROSSREFS

Cf. A030588, A030596, A030597, A030598, A030600.

Sequence in context: A171624 A032548 A030597 * A237413 A157343 A373820

Adjacent sequences: A030596 A030597 A030598 * A030600 A030601 A030602

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

EXTENSIONS

Terms corrected by Antti Karttunen, Dec 24 2018

STATUS

approved