A397174 The rows of A397173 converge to this sequence.

1, 2, 4, 4, 6, 4, 12, 8, 14, 8, 17, 8, 17, 15, 22, 17, 22, 21, 22, 26, 26, 28, 28, 25, 31, 23, 36, 29, 43, 31, 40, 33, 42, 46, 37, 46, 39, 51, 36, 50, 45, 48, 45, 49, 54, 45, 57, 48, 59, 63, 60, 65, 57, 63, 56, 62, 67, 74, 70, 70, 70, 70, 74, 76, 77, 84, 70, 92, 71, 88, 84, 86, 90, 95, 96, 76, 97, 81, 85, 82, 96, 101, 88, 98, 90, 86, 101

Offset

0,2

Comments

This sequence has the same status as A397471, A397175, and A397176: it is conjectural, although almost certainly correct.

Empirically, once a value >2*k is observed in A397173, then the value of a(k) will remain stable.

Links

Table of n, a(n) for n=0..86.

Formula

G.f.: (1/2)*(g(x)^2-g(x^2)), where g(x) = Sum_{k>=0} x^A394611(k+1). - Thomas Scheuerle, Jun 29 2026

Crossrefs

Cf. A394611, A397173.

Sequence in context: A225520 A132857 A365264 * A152782 A307119 A266076

Adjacent sequences: A397171 A397172 A397173 * A397175 A397176 A397177

Keyword

nonn,new

Author

Sean A. Irvine and N. J. A. Sloane, Jun 26 2026

Status

approved