A342280 a(n) = A001952(2*n+1).

3, 10, 17, 23, 30, 37, 44, 51, 58, 64, 71, 78, 85, 92, 99, 105, 112, 119, 126, 133, 139, 146, 153, 160, 167, 174, 180, 187, 194, 201, 208, 215, 221, 228, 235, 242, 249, 256, 262, 269, 276, 283, 290, 297, 303, 310, 317, 324, 331, 338, 344, 351, 358, 365, 372

Offset: 0

Author

N. J. A. Sloane, Mar 16 2021

Keywords

• nonn

Links

• N. J. A. Sloane, Families of Essentially Identical Sequences, Mar 24 2021 (Includes this sequence)

Crossrefs

Bisection of A001952.

Cf. A187393.

Programs

Python

from sympy import integer_nthroot
def A342280(n): return 4*n+2+integer_nthroot(8*n*(n+1)+2,2)[0] # Chai Wah Wu, Mar 16 2021