A185257 A185243(n) is the a(n)-th triangular number.

8, 23, 46, 59, 108, 106, 156, 182, 346, 348, 542, 766, 727, 717, 1071, 1153, 977, 1640, 1739, 1703, 2019, 1841, 1834, 2628, 2668, 2804, 2278, 2679, 2817, 2918, 4105, 4243, 4921, 4028, 5936, 5528, 4728, 7302, 8576, 7453, 7184, 9516, 9630, 11107, 11828, 11889, 12241

Offset

1,1

Comments

See A185128 for further information.

References

Albert H. Beiler, Recreations in the theory of numbers, New York, Dover, (2nd ed.) 1966, p. 197, no. 8.

Links

Table of n, a(n) for n=1..47.

N. J. A. Sloane, Annotated scan of Beiler's Table 81, based on page 197 of Beiler's "Recreations in the Theory of Numbers: The Queen of Mathematics Entertains", New York, Dover, First ed., 1964.

Crossrefs

Cf. A000217, A185128, A185129, A185223, A185233, A185243, A185253, A185258.

Sequence in context: A226600 A178072 A351966 * A033951 A209992 A212118

Adjacent sequences: A185254 A185255 A185256 * A185258 A185259 A185260

Keyword

nonn

Author

Martin Renner, Jan 20 2012

Extensions

Edited (with a simpler definition) by N. J. A. Sloane, Dec 28 2024

Status

approved