A189829 Record values of d(n-1) + d(n+1), where d(k) is the number of divisors of k.

3, 5, 7, 8, 10, 11, 12, 14, 16, 20, 22, 24, 26, 28, 32, 34, 36, 38, 44, 46, 48, 52, 56, 58, 60, 68, 72, 76, 78, 80, 84, 88, 92, 96, 98, 100, 104, 106, 108, 116, 124, 128, 136, 148, 156, 160, 168, 172, 174, 176, 184, 196, 200, 208, 224, 236, 248, 260, 268

Offset

1,1

Comments

The n are in A189828.

Links

Donovan Johnson, Table of n, a(n) for n = 1..135

Crossrefs

Cf. A189827, A189828.

Sequence in context: A186689 A186350 A360392 * A175146 A351076 A171508

Adjacent sequences: A189826 A189827 A189828 * A189830 A189831 A189832

Keyword

nonn

Author

T. D. Noe, Apr 28 2011

Status

approved