A377926 Indices of records in A228407.

0, 1, 4, 8, 13, 15, 22, 28, 29, 30, 31, 62, 78, 94, 108, 138, 169, 205, 238, 279, 290, 291, 292, 293, 294, 295, 296, 297, 298, 299, 300, 301, 302, 303, 304, 305, 306, 307, 419, 519, 611, 667, 884, 3341, 3415, 3839, 4623, 4665, 5974, 5975, 5976, 5977, 5978, 5979, 5980, 5981, 5982, 5983, 5984, 5985, 5986, 5987, 5988, 5989, 5990, 5991, 5992, 5993, 5994, 5995, 5996, 5997, 5998

Offset

1,3

Links

Chai Wah Wu, Table of n, a(n) for n = 1..10000 (terms 1..514 from N. J. A. Sloane)

Prog

(Python)
from itertools import islice
from collections import Counter
def A377926_gen(): # generator of terms
    yield from (0, 1)
    l, s, b, c, j = Counter('11'), 1, {11}, 11, 1
    while True:
        i = s
        while True:
            if i not in b:
                li, o = Counter(str(i)), 0
                for d in (l+li).values():
                    if d % 2:
                        if o > 0:
                            break
                        o += 1
                else:
                    j += 1
                    if i>c:
                        yield j
                        c = i
                    l = li
                    b.add(i)
                    while s in b:
                        b.remove(s)
                        s += 1
                    break
            i += 1
A377926_list = list(islice(A377926_gen(), 40)) # Chai Wah Wu, Dec 14 2024

Crossrefs

Cf. A228407, A229218, A377925.

Sequence in context: A311670 A311671 A311672 * A311673 A311674 A311675

Adjacent sequences: A377923 A377924 A377925 * A377927 A377928 A377929

Keyword

nonn,base

Author

N. J. A. Sloane, Dec 14 2024

Status

approved