A255550 Main diagonal of array A255551.

2, 5, 39, 91, 199, 315, 567, 829, 1227, 1513, 1953, 2569, 3277, 3769, 5119, 5925, 6607, 7539, 8319, 9375, 11007, 12511, 14103, 15801, 17593, 19165, 22213, 23617, 25467, 26967, 29347, 32733, 35809, 38085, 40953, 42915, 49093, 51787, 54055, 57459, 60409, 64057, 68433, 71637, 76299, 79719, 82545, 86133, 94921, 98037, 102745

Offset: 1

Author

Antti Karttunen, Feb 26 2015

Keywords

• nonn

Comments

Equally, 2 followed by the first subdiagonal of A255543.

Crossrefs

Cf. A255543, A255551, A255549.

Cf. also A083141, A255410, A255553.

Formula

a(n) = A255551(n,n).

a(1) = 2; for n > 1: a(n) = A255543(n,n-1).

Other identities.

For all n >= 1, a(n) = A255553(A083141(n)).