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A255765 Partial sums of A255744. 5
1, 11, 21, 111, 121, 211, 301, 1111, 1121, 1211, 1301, 2111, 2201, 3011, 3821, 11111, 11121, 11211, 11301, 12111, 12201, 13011, 13821, 21111, 21201, 22011, 22821, 30111, 30921, 38211, 45501, 111111, 111121, 111211, 111301, 112111, 112201, 113011, 113821, 121111 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Also, this is a row of the square array A255741.

Is this sequence related to positive repunits? (see formula section).

LINKS

Felix Fröhlich, Table of n, a(n) for n = 1..10000

FORMULA

Question: a(2^k) = A002275(k+1), k >= 0. Is this true?

PROG

(PARI) lista(nn) = {s = 1; for (n=2, nn, print1(s, ", "); s += 10*9^(hammingweight(n-1)-1); ); } \\ Michel Marcus, Mar 15 2015

(PARI) a(n) = sum(k=1, n, if (k==1, 1, 10*9^(hammingweight(k-1)-1))); \\ Michel Marcus, Mar 15 2015

CROSSREFS

Cf. A002275, A005408, A151788, A147562, A151790, A151781, A151792, A151793, A255740, A255741, A255744, A255764, A255766.

Sequence in context: A058489 A278780 A071158 * A071157 A096104 A126299

Adjacent sequences:  A255762 A255763 A255764 * A255766 A255767 A255768

KEYWORD

nonn

AUTHOR

Omar E. Pol, Mar 05 2015

EXTENSIONS

More terms from Michel Marcus, Mar 15 2015

STATUS

approved

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Last modified March 19 11:29 EDT 2019. Contains 321329 sequences. (Running on oeis4.)