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A074648
a(n)=A074639(A074647(n)).
0
0, 0, 1, 5, 11, 31, 75, 91, 145, 225, 241, 319, 419, 599, 727, 949, 803, 1115, 1353, 1219, 1869, 2085, 2285, 2583, 3101, 4347, 4683, 5009, 5921, 5717, 6467, 7473, 7573, 8675, 9423, 8615, 10147, 10837, 12797, 13167, 13249, 14341, 15321
OFFSET
1,4
CROSSREFS
Cf. A074639.
Sequence in context: A246010 A077446 A023276 * A236428 A106908 A107442
KEYWORD
nonn
AUTHOR
Michele Dondi (bik.mido(AT)tiscalinet.it), Sep 18 2002
STATUS
approved