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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 FrĂ¶hlich, 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 February 20 07:28 EST 2020. Contains 332067 sequences. (Running on oeis4.)