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

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 A102679

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