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A015698
Number of 5-tuples of different integers from [ 1,n ] with no common factors among pairs.
2
0, 0, 0, 0, 0, 0, 2, 3, 6, 6, 32, 33, 105, 114, 128, 157, 385, 400, 831, 886, 1001, 1076, 2004, 2074, 2817, 3022, 3655, 3880, 6379, 6449, 10020, 10978, 12063, 12791, 14417, 14767, 21746, 22977, 25038, 25860, 36660, 37110, 51088, 53449, 56199
OFFSET
1,7
CROSSREFS
Column 5 of triangle A186974. Partial sums of A186976.
Sequence in context: A057545 A015628 A060692 * A068587 A218954 A182560
KEYWORD
nonn
STATUS
approved