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 A187395 a(n) = floor(r*n), where r = 4 + sqrt(10); complement of A187396. 3
 7, 14, 21, 28, 35, 42, 50, 57, 64, 71, 78, 85, 93, 100, 107, 114, 121, 128, 136, 143, 150, 157, 164, 171, 179, 186, 193, 200, 207, 214, 222, 229, 236, 243, 250, 257, 265, 272, 279, 286, 293, 300, 307, 315, 322, 329, 336, 343, 350, 358, 365, 372, 379, 386, 393, 401, 408, 415, 422, 429, 436, 444, 451, 458, 465, 472, 479, 487, 494, 501 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A187395 and A187396 are the Beatty sequences based on r = 4 + sqrt(10) and s = -2 + sqrt(10); 1/r + 1/s = 1. LINKS Table of n, a(n) for n=1..70. FORMULA a(n) = floor(r*n), where r = 4 + sqrt(10). MATHEMATICA r=4+10^(1/2); s=-2+10^(1/2); Table[Floor[r*n], {n, 1, 80}] (* A187395 *) Table[Floor[s*n], {n, 1, 80}] (* A187396 *) PROG (Python) from sympy import integer_nthroot def A187395(n): return 4*n+integer_nthroot(10*n**2, 2)[0] # Chai Wah Wu, Mar 16 2021 CROSSREFS Cf. A187396. Sequence in context: A206717 A043393 A028437 * A033019 A031483 A020334 Adjacent sequences: A187392 A187393 A187394 * A187396 A187397 A187398 KEYWORD nonn AUTHOR Clark Kimberling, Mar 09 2011 EXTENSIONS Edited by Clark Kimberling, Mar 17 2021 STATUS approved

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Last modified December 9 10:58 EST 2023. Contains 367690 sequences. (Running on oeis4.)