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A024404 Number of products of distinct primes <= prime(n) equal to -1 (mod prime(n)). 0
1, 1, 0, 1, 2, 1, 3, 7, 10, 17, 33, 56, 102, 197, 359, 617, 1128, 2182, 3966, 7488, 14538, 26766, 51232, 95325, 174742, 335555, 657893, 1266230, 2485507, 4793512, 8521770, 16519171, 31580739, 62246045, 116079942, 229064794, 440508973, 848388680 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..38.

CROSSREFS

Sequence in context: A178079 A258987 A174254 * A077173 A063509 A137766

Adjacent sequences:  A024401 A024402 A024403 * A024405 A024406 A024407

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified February 24 13:13 EST 2021. Contains 341569 sequences. (Running on oeis4.)