98957

Appears in sequences

• Self-convolution of (1, p(1), p(2), ...).at n=38A023626
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 33.at n=9A031621
• Number of polyominoes with n cells, symmetric about two orthogonal axes.at n=38A056877
• Sequence gives the denominators, in increasing values, of Egyptian fractions such that their alternating sum has the concatenation of these denominators as decimal part. a(1) = 3.at n=2A303388
• Number of polyominoes of n cells with both horizontal and vertical symmetries, for which the 180-degree rotational symmetry has an axis that coincides with the center of a square, but without 90-degree rotational symmetry.at n=38A351190