A047987 Integers n such that A047988(n)=4.

3976733, 8053483, 9942523, 10197427, 15126557, 28623773, 32269037, 34438387, 36627413, 39593803, 47812747, 49120843, 55066867, 69909667, 78068443, 80024213, 83402597, 89512483, 97799033, 101652883, 106675637, 116621213, 120317683, 128241067

Offset: 1

Author

Thomas Kantke (bytes.more(AT)ibm.net)

Keywords

• nonn

References

• Thomas Kantke, Mathematische Unterhaltungen, Spectrum der Wissenschaft, April 1993, pp. 11-13.

Crossrefs

Cf. A047836, A047984-A047988.

Extensions

More terms from Max Alekseyev, Jun 13 2011