A376052 Lexicographically earliest sequence of positive integers a(1), a(2), a(3), ... such that for any n > 0, S(n) = Sum_{k = 1..n} 1/((2*k+1)*a(k)) < 1.

1, 1, 1, 1, 1, 1, 2, 6, 31, 1527, 3509710, 19634198420529, 670572652324570519822017836, 444183929825540926086588009989665668909119960123355423

Offset

1,7

Links

Table of n, a(n) for n=1..14.

Crossrefs

Cf. A374663, A375516, A375531, A375532, A375781, A375522, A376048-A376051, A376053, A376054, A376055.

Sequence in context: A003087 A203901 A342396 * A190958 A340232 A109243

Adjacent sequences: A376049 A376050 A376051 * A376053 A376054 A376055

Keyword

nonn

Author

N. J. A. Sloane, Sep 14 2024

Status

approved