A347320 A344857(2*n).

0, 4, 42, 176, 540, 1152, 2534, 4608, 6984, 12580, 19250, 26016, 39988, 55076, 63570, 97920, 127024, 155088, 203946, 253360, 289044, 378884, 456918, 528672, 648200, 763620, 869022, 1040368, 1204196, 1318440, 1588750, 1812224, 2013132, 2329476, 2626330, 2910672, 3303804, 3687748, 4039854, 4555520, 5043000, 5471088, 6133778, 6740976, 7295760, 8090020, 8836094, 9544128, 10481296, 11384900

Offset: 1

Author

Scott R. Shannon and N. J. A. Sloane, Sep 12 2021, extended Jun 23 2025

Keywords

• nonn
• more

Comments

No formula is known.

Crossrefs

Cf. A344857, A344866.